JPH09267180A - Flash welding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To coat an end face of an end part of an object to be welded with a combustible liquid neither more nor less in the object where end parts of an advancing and a following objects to be welded are cut respectively with a shear and executed with flash welding. SOLUTION: Before welding, width direction beginning ends of object 1, 2 to be welded are detected with width end detecting sensors 31, 33, coating of a combustion liquid are started from a beginning end of the width direction to end face with nozzles 35, 36, width direction final ends of the objects 1, 2 to be welded are detected with the width direction detecting sensors 31, 33, coating the end faces of the objects 1, 2 to be welded with the combustible liquid is stopped, and the objects 1, 2 to be welded are coated with the combustible liquid over from the beginning end to the final end scheduled of coating in the width direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flash welding apparatus for applying flammable fluid to a cut end surface of a material to be welded before welding and performing welding in an oxygen-deficient atmosphere.

[0002]

2. Description of the Related Art FIG.
It is a block diagram which shows the conventional flash welding apparatus described in the gazette. In the figure, 1 and 2 are first and second materials to be welded 3 and 4 which are stopped at opposing positions at a predetermined interval, for example, a silicon steel plate or a special steel, and 3 and 4 are both materials to be welded 1 and 2.
The first and second electrodes 5 and 6 for supporting the lower surface of the welding target materials 1 and 2 for supplying a welding current to the welding target materials 1 and 2 are provided on the upper surfaces of both welding target materials 1 and 2 and together with the electrodes 3 and 4, respectively. It is the 1st and 2nd clamp which clamps both to-be-welded materials 1 and 2, respectively.

Reference numerals 7 and 7 denote rotary shears, which are both welded materials 1
1 and 2 attached to a pair of rotating shafts arranged at a predetermined interval, and main bodies 8, 8 provided at a predetermined interval between 2 and 2.
Equipped with a pair of rotary blades 9, 10 and 9, 10, both welded materials 1
And 2 are cut at the ends 1a and 2a, respectively. 11,
11 is a tank provided with an upper portion of the main body 8, 8 of the rotary shear 7, 7 in which oil as a combustible fluid is sealed, and 12, 12 has one end connected to the tank 11, 11.
The other end of the connecting pipe is opened so as to face the cut portions of the materials to be welded 1 and 2, and 13 and 13 are pumps provided in the middle of these connecting pipes 12 and 12, respectively, which are main bodies 8 of the rotary shears 7 and 7. , 8 are interlocked with the rotary shafts, that is, interlocked with the cutting operation of the rotary shear 7.

Next, the operation of the conventional flash welding apparatus configured as described above will be described. First, the materials to be welded 1 and 2 are conveyed and installed at predetermined positions as shown in the figure, and are sandwiched by the electrodes 3 and 4 and the clamps 5 and 6, respectively. Then the rotary shears 7,7
Is to rotate the rotary blades 9, 10 and 9, 10 by rotating the rotary shafts of the main bodies 8, 8 while moving from one end side in the width direction of both welded materials 1 and 2 to the other end side. , The ends 1a and 2a of the welded materials 1 and 2 are cut. Along with this, the pumps 13, 13 are driven in conjunction with the rotation of the rotary shafts of the main bodies 8, 8 of the rotary shears 7, 7, and the oil in the tanks 11, 11 is drawn out from the inside of the tanks 11, 11. , And is applied to the cut end surfaces of the materials to be welded 1 and 2 through the connecting pipes 12 and 12.

Then, the rotary shears 7, 7 are returned to their original positions after the cutting of the materials 1 and 2 to be welded is completed.
Next, an electric current is applied to both electrodes 3 and 4, and the second welded material 2 moves toward the first welded material 1 while being sandwiched by the second electrode 4 and the second clamp 6. , Both welded materials 1
And the cut surfaces of 2 are brought into contact. Then, at the cut portions of both the materials to be welded 1 and 2, sparks are generated by the welding current and melted, and the oil applied is burned, and the materials to be welded 1 and 2 are welded in an oxygen-deficient atmosphere. Is flash welded.

[0006]

The conventional flash welding apparatus is constructed as described above, and the materials to be welded 1 and 2 are welded.
After the pair of circular rotary blades 9, 10 and 9, 10 bite, the pumps 13, 13 rotate, and thereafter,
Oil is applied to the cut end face through the connecting pipes 12, 12. Therefore, when the oil in the connecting pipes 12 and 12 starts the next cutting after the completion of one cutting, the oil is not completely blocked (the oil in the connecting pipes 12 and 12 spontaneously drip, and the oil in the pipes is blocked. Is not happening)
It is not possible to apply oil to the entire area from the cutting start point to the cutting end point (starting end to ending end in the width direction of the material to be welded).
Further, the pumps 13 and 13 are driven in association with the rotary shafts of the bodies 8 of the rotary shears 7 and 7, so that the materials to be welded 1 and
Since oil is always applied to the cut end surface of No. 2, even if the material to be welded by the flash welding device is a material such as low carbon steel that does not require oil to be applied to the cut end surface, oil is applied. There were problems such as being lost.

The present invention has been made to solve the above problems, and enables the flammable fluid to be applied from the starting end to the ending end of the material to be welded in the width direction to be welded. An object of the present invention is to provide a flash welding apparatus capable of adjusting whether or not a flammable fluid is applied to a cut end surface or adjusting the amount of a flammable fluid applied depending on the steel type of a material to be welded.

[0008]

In the flash welding apparatus according to the present invention, in which the end portions of the preceding and following workpieces are respectively cut by a shear to perform flash welding, the above-mentioned workpieces are welded before welding. Detecting the width direction start end of
Starting the application of the flammable fluid from the widthwise starting end of the material to be welded to the end surface, and stopping the application of the flammable fluid to the end surface of the material to be welded by detecting the widthwise end of the material to be welded. Thus, the flammable fluid is applied from the starting end to the ending end in the width direction of the material to be welded.

Further, the flammable fluid application device has a nozzle that moves in the width direction of the material to be welded and applies the flammable fluid, and the sensor for detecting the width end of the material to be welded moves the nozzle in the width direction of the material to be welded. The nozzle is integrally attached to the nozzle at a position preceding it. Further, a nozzle and a sensor for detecting the width end of the material to be welded are mounted on the shear. Further, the shear for cutting the end of the material to be welded, the sensor for detecting the width end of the material to be welded and the nozzle for applying the flammable fluid are commonly used for the preceding and subsequent welding materials. The combustible fluid is grease.

Further, the welded material width end detection sensors for detecting the widthwise start and end of the welded material are provided for the tail end of the preceding welded material and the tip of the trailing welded material, respectively. The width end detection sensor for the end and the width end detection sensor for the front end, both of which have detected the width direction start end, start the application of the flammable fluid to the end surface of the material to be welded, and the tail end width end. Either one of the detection sensor and the width end detection sensor for the leading edge detects the widthwise end, so that the application of the flammable fluid to the end surface of the welding target material is stopped. The flammable fluid is applied from the beginning to the end in the width direction facing each other.

Further, it has a control device, and determines whether or not the flammable fluid applying device applies the flammable fluid based on the steel type information inputted to the control device. Furthermore, a control device is provided, and the amount of the flammable fluid applied by the flammable fluid applying device is adjusted based on the steel type information input to the control device.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. Embodiments of the present invention will be described below with reference to the drawings. 1 is a block diagram of a flash welding apparatus using a guillotine shear according to Embodiment 1 of the present invention, and FIG.
2 is a sectional view taken along the line II-II in FIG. 1. In the figure, reference numerals 1 and 2 denote a preceding welded material and a trailing welded material, respectively, which are conveyed and stopped at predetermined positions facing each other at predetermined intervals so that their ends are cut, for example, a silicon steel plate or a special steel plate. It is a rope.
Reference numerals 3 and 4 respectively support the lower surfaces of the materials 1 and 2 to be welded, and first and second electrodes for supplying a welding current to the materials 1 and 2 to be welded. Are first and second clamps which are provided on the upper surface of and clamp the materials to be welded 1 and 2 together with the electrodes 3 and 4, respectively. The first clamp 5 is vertically guided by the pair of fixed bases 21 and 21. The second clamp 6 is guided by a pair of moving bases 22 (only one of which is shown) to move up and down. The movable table 22 includes a guide plate 23,
It is supported by 23 and moves forward and backward by a cylinder 24. These fixed bases 21 and 21, movable base 22, guide plates 23 and 2
3. The entire cylinder 24 is supported by the common base 25.

Reference numeral 26 is an exit-side guillotine shear having a pair of upper and lower blades, and 27 is an inlet-side guillotine shear having a pair of upper and lower blades, which is held by a carriage 28 and guided by a guide 29 to move forward and backward by a cylinder 30. Carriage 2
The direction of forward and backward movement of 8 is a direction orthogonal to the longitudinal direction of the material to be welded, that is, the width direction of the material to be welded. Reference numeral 31 is a width end detection sensor for the tail end of the preceding welded material 1 that detects the widthwise start end and end of the welded material, and is provided at the tip of the support arm 32 of the exit side guillotine shear 26 as shown in FIGS. It moves in the width direction of the preceding welded material 1 on the tail end surface of the attached preceding welded material 1 left uncut. Reference numeral 33 is a width-end detection sensor for the tip of the trailing welded material 2 that detects the widthwise start and end of the welded material, and is attached to the tip of the support arm 34 of the entry-side guillotine shear 27 and left uncut. The tip end face of the material to be welded 2 is moved in the width direction of the material to be welded 2.

Reference numeral 35 denotes a nozzle of a flammable fluid applying device for applying a flammable fluid, which is attached to the tip of the supporting arm 32 integrally with the tail end width end detection sensor 31 as shown in FIGS. It moves in the width direction of the preceding weld material 1 on the tail end face of the remaining preceding weld material 1. In this case, the tail end width end detection sensor 3 is attached to the tip end of the support arm 32 toward the tip end side.
1. Attach the nozzle 35 in this order. Reference numeral 36 is a nozzle of a flammable fluid applying device for applying a flammable fluid, which is attached integrally to the tip width end detection sensor 33 at the tip of the support arm 34 and is left on the tip end surface of the trailing welded material 2 left uncut. Is moved in the width direction of the trailing welded material 2. In this case, the width end detection sensor 3 for the tip is attached to the tip of the support arm 34 toward the tip side.
3 and the nozzle 36 are attached in this order.

FIG. 3 is a block diagram for explaining the flammable fluid application system used in the first embodiment. In the figure, 41
Is steel type information such as material, plate thickness, and plate width of the material to be welded inputted to a host computer (not shown), 42 is a control device which is a welding control computer, and whether or not the flammable fluid is applied based on the steel type information Has a table indicating. Further, it has a table of flash charges, upset charges, flash times, upset times, and the like. FIG. 4 shows an example of a flammable fluid application table. As shown in this table, no application is performed for low and high carbon steels. In the case of silicon steel sheet, the content of Si differs depending on the amount of Si contained.
If the weight is less than 0.5%, the application is not performed.
When the weight of contained Si is 0.5 to 1.5%, application is performed. When the plate thickness is less than 3 mm, oil is applied at a rate of 2 cc per 100 mm in the width direction of the welded material, and the plate thickness Is 3m
4 or more per 100 mm in the width direction of the material to be welded when m or more
Apply oil by the ratio of cc. The controller 42 includes a tail end width end detection sensor 31 of the preceding welded material 1 and a trailing welded material 2
The detection output of the starting end and the ending end of the material to be welded of the tip width end detection sensor 33 is input.

Reference numeral 43 denotes a coating amount adjuster, which determines whether or not the coating is applied (that is, the variable speed motor 44 is O
N, OFF) and the amount of application when there is application (that is, adjustment of the motor speed). When the variable speed motor 44 is driven, oil that is a combustible fluid stored in the tank 46 is discharged by the pump 45 through the filter 47, passes through the throttle valve 48, the pipes 49, 49, and the nozzle 35,
And is applied to the end surfaces of the preceding welded material 1 and the following welded material 2. The flammable fluid may be oil or grease. For example, turbine oil is used as the oil, and lithium grease is used as the grease. In the case of grease, the applied grease does not easily flow and drip, and does not deteriorate the environmental condition of the surrounding equipment. The output signal lines 50 and 50 from the pipes 49 and 49 through which the flammable fluid passes and the width end detection sensors 31 and 33 for the tail end and the tip end are
The support arms 32 and 34 (see FIG. 2) and the carriage 28 are held along the carriage 28, and are carried as the carriage 28 moves. Reference numeral 51 denotes various signal lines output from the control device 42 at the time of controlling the welding of the preceding and following workpieces 1 and 2.

Next, the first embodiment configured as described above
The operation of the flash welding apparatus will be described with reference to the flowcharts of FIGS. When the line drive control is started by the host computer for line drive control (S1), the preceding welded material 1 and the following welded material 2 are controlled to be conveyed and stopped at the opposite end cutting positions (S2). Steel type information 41 is transmitted from the host computer to the control device 42 (S
3). Next, the control device 42, which is a welding control computer, controls steps S4 to S19 described below. The preceding weld material 1 is sandwiched between the first clamp 5 and the first electrode 3, and the following weld material 2 is sandwiched between the second clamp 6 and the second electrode 4 (S4). Outgoing / Incoming Guillotineshire 26, 2
The carriage 28 of No. 7 moves forward, leading and trailing welded materials 1,
The tail end and tip of 2 are the guillotine shears 26, 27 on the outgoing side and the incoming side.
Inserted between the upper and lower blades of the machine and stopped, and the guillotine shear 2
6, 27 are driven and cut (S5), and the scrap is dropped.

The backward movement of the carriage 28 of the outgoing / incoming guillotine shears 26 and 27 is started (S6), and the flammable fluid applying operation is started. FIG. 7 is an explanatory diagram of the flammable fluid application operation, and most of the support arms 32 and 34 of the carriage 28 are shown by broken lines. Since it is the time when the carriage 28 moves backward (moves in the direction of the arrow in the figure), the tail end / tip width end detection sensors 31 and 33 attached to the tip ends of the support arms 32 and 34 of the carriage 28 are coated. Nozzle 3
The start ends of the preceding and following welded materials 1 and 2 are reached before 5, 36, and start end detection outputs are transmitted to the control device 42 (S7). At this time, the width end detection sensor 3 for the tail end and the tip end
When either one of 1 and 33 detects the start end (detected by the width end detection sensor 33 for the tip in FIG. 7) and the other also detects the start end (detected by the width end detection sensor 31 for the tail in FIG. 7) ( S8), the coating nozzles 35 and 36 apply the oil from the widthwise starting ends where the preceding and following workpieces 1 and 2 are opposed to each other, and the controller 42 controls the coating amount adjuster 4 to match the time.
The variable speed motor 44 is driven via 3 (S9). If the flammable fluid in the nozzles 35 and 36 is not completely blocked in the nozzles 35 and 36 when the next coating operation is started after the previous coating operation, the variable speed motor 44 is driven as early as possible, It is advisable to apply oil from the starting ends of the preceding and following workpieces 1 and 2 to be opposed in the width direction. In this case, as the motor 44, a constantly driven constant speed motor is used, and the control device 42 adjusts the discharge flow rate by controlling ON / OFF / opening of a flow rate proportional valve (not shown). You can

Next, the tail end / tip width end detection sensor 3
1 and 33 eventually reach the ends of the leading and trailing materials to be welded 1 and 2, and respectively send the end detection outputs to the control device 42 (S10). At this time, when one of the tail end / tip end width end detection sensors 31 and 33 detects the end (in FIG. 7, it is detected by the tail end width end detection sensor 31) (S11),
Nozzles 35 and 36 for coating are used for leading and trailing welded materials 1 and 2.
The control device 42 stops the driving of the variable speed motor 44 via the application amount adjuster 43 in accordance with the time such that the application of the flammable fluid is stopped up to the end in the width direction opposite to each other (S1).
2). 52 and 53 are the preceding and following welded materials 1 and 2, respectively.
The flammable fluid is applied to the portion where the leading and trailing materials to be welded 1 and 2 just hit and are welded. In this case, the portion to which the flammable fluid is applied may be slightly wider than the portion where the preceding and succeeding materials to be welded 1 and 2 abut and are welded to ensure that the entire welding range is applied. . The flammable fluid can be applied by dripping, spraying or brushing. Further, the application may be applied not only to the upper surface of the tail end / tip of the welded material but also to the lower surface. This completes the flammable fluid application operation, the backward movement of the carriage 28 of the exit-side and entrance-side guillotine shears 26, 27 ends, and the carriage 28 stops at the original position (S13). In the case of a material such as low carbon steel that does not require application of oil to the cut end surface, according to the steel type information 41,
No flammable fluid application is of course performed.

With the voltage applied to both electrodes 3 and 4, the trailing welded material 2 sandwiched between the second clamp and the second electrode is
By moving the moving table 22 based on the driving of the cylinder 24,
It advances toward the preceding weld material 1 and slightly contacts the tail end of the preceding weld material 1 (S14 in FIG. 6). Both electrodes 3, 4
Flushing is performed by applying a flash current in between (S1
5). At this time, since the flammable fluid applied to both the materials to be welded 1 and 2 burns, welding proceeds in an oxygen-deficient atmosphere. After that, the succeeding welded material 2 advances further, and the welding is completed through the upsetting process (S16). The welded portion is trimmed (S17), the first and second clamps 5 and 6 are released (S18), and the trimming device (not shown) is returned (S1).
9). The control of the control device 42, which is a welding control computer, is completed up to this point. Then, the welded material is carried by the host computer (S20).

When the amount of the flammable fluid to be applied is small, the oxygen deficient state cannot be maintained until the end of welding. On the contrary, when the amount is too large, the flammable fluid flows and drops into the apparatus, deteriorating the environmental condition of the equipment. However, in the first embodiment, the application of the flammable fluid is controlled to an appropriate amount by the control device 42 which receives the steel type information and has the application table for the flammable fluid. In the above description, after cutting the end portions of the preceding and following welded materials 1 and 2,
When the guillotine shears 26 and 27 on the delivery side and the entry side move backward, the flammable fluid was applied to the end faces, but before the ends of the preceding and following welding target materials 1 and 2 were cut, the exit side and the entry side When the guillotine shears 26 and 27 move forward, the flammable fluid may be applied to the end faces. In this case, nozzles 35, 36 for the tip end of the support arms 32, 34 toward the tip end,
Attach the width end detection sensors 31 and 33 for the tip in this order,
Before the nozzles 35 and 36, the tail end / tip end width end detection sensors 31 and 33 reach the leading and trailing ends of the leading and trailing welded materials 1 and 2 in the width direction.

Embodiment 2 FIG. Although the guillotine shear has been described in the first embodiment as a method of cutting both the materials to be welded 1, 2, the materials to be welded 1, 2 are welded by the rotary shear.
There is also a way to disconnect. FIG. 8 is a configuration diagram of a rotary shearing device used in the second embodiment, which corresponds to FIG. 2 in the guillotine shears of the first embodiment and uses a rotary shear instead of the guillotine shears. In the figure, 6
Reference numeral 1 is a rail for forward / backward movement of the rotary shear 62, which is provided between the fixed bases 21 and 21 and the movable base 22 shown in FIG.
And is disposed below the materials to be welded 1 and 2 so as not to interfere with the conveyance of the materials to be welded 1 and 2. The one shown by the two-dot chain line in the center is the common base 25
And the fixed bases 21, 21 and the like mounted thereon. Reference numeral 63 denotes a forward / backward movement chain of the rotary shear 62, which is driven by a hydraulic motor 64. Reference numeral 65 is an axis that rotates as the chain 63 moves, and the number of rotations is counted by the absolute coder 66. The arrow 67 indicates the forward direction of the rotary shear 62.

The rotary shear 62 has an outlet shear 68 consisting of a pair of rotary blades and an inlet shear 69 consisting of a pair of rotary blades. Further, it has a fixed support arm 70,
The tail end width end detection sensor 31 and the flammable fluid application nozzle 35 are integrally mounted in the order of the forward direction of the rotary shear 62 and the tail end width end detection sensor 31. The support arm 70 is further integrated with the tip end width end detection sensor 33 and the flammable fluid application nozzle 36, and the nozzle 3 is directed toward the forward direction of the rotary shear 62.
6, the tip width sensor 36 is attached in this order. Similar to the first embodiment, the tail end width end detection sensor 3
1 moves in the width direction of the preceding welded material 1 on the tail end face of the preceding welded material 1 left uncut, and the tip end width end detection sensor 33
Is left on the tip end face of the material 2 to be welded
Move in the width direction.

Reference numeral 71 is a pipe through which a flammable fluid passes, 72 is a cable bear, and 46 is an oil tank. The cable bear 72 is connected to the pipe 71 as the rotary shear 62 moves forward and backward.
At the same time, the output signal lines of the tail end / tip end width end detection sensors 31 and 33 are transferred. Reference numeral 73 denotes a rotary shaft around which the output shear 68, the input shear 69, the support arm 70, etc., which are the upper parts of the rotary shear 62, fall and stand up to lower the height of the posture.

Next, a second embodiment configured as described above
The operation of the flash welding apparatus will be described with reference to the flowcharts of FIGS. Steps S1 to S4 are the same as those in the first embodiment. A host computer controls S1 to S3, and a controller 42, which is a welding control computer, controls S4 to S23. Then, when the rotary shear 62 is moved forward, the exit-side and entry-side shears 68 and 69 are welded to the welded materials 1 and 2.
Bite and cut the materials 1 and 2 to be welded (S2
1). Along with that, width end detection sensor 3 for tail end and tip end
1,33 precedes the coating nozzles 35,36.
The widthwise starting ends of the trailing welded materials 1 and 2 are reached, and the starting end detection outputs are transmitted to the control device 42 (S7). At this time, when one of the tail end / tip end width end detection sensors 31 and 33 detects the start end and the other also detects the start end (S8), the coating nozzles 35 and 36 are welded to the leading or trailing end. The controller 42 controls the application amount adjuster 43 according to the time when the materials 1 and 2 apply the oil from the opposite ends in the width direction.
The variable speed motor 44 is driven via (S9).

Width edge detection sensors 31, 3 for tail end and tip end
3 eventually reaches the ends of the preceding and following workpieces 1 and 2, and sends the end detection outputs to the control device 42 (S10). At this time, when either one of the tail end / tip end width end detection sensors 31 and 33 detects the end (S1
1), the application nozzles 35, 36 apply the control device 42 in accordance with a time such that the application of the flammable fluid is stopped by the end points where the preceding and following workpieces 1, 2 are opposed in the width direction. The drive of the variable speed motor 44 is stopped via the amount adjuster 43 (S12). This ends the flammable fluid application operation.
During this time, the rotary shear 62 continues to move forward and stops at a position further away from the widthwise ends of the materials to be welded 1 and 2 (S22).

Next, in FIG. 10, steps S14 to S19 are the same as those in the first embodiment. Step S19
After the end of the above, the upper portion of the rotary shear 62 is tumbled around the shaft 73 (see FIG. 8), and the rotary shear 62 moves backward in a low posture state in which the rotary shear 62 can pass below both the welding materials 1 and 2. It returns to its original position, stands upright and stops (S23). The control of the control device 42, which is a welding control computer, is completed up to this point. Then, the welded materials 1 and 2 are conveyed by the host computer (S24).

Embodiment 3. In the first embodiment,
Entry-side guillotine shears 26, 27 and width-end detection sensors 31, 33 for tail end / tip attached thereto and nozzles 35, 3
The carriage 28 on which 6 and 6 are mounted moves forward and backward between the fixed bases 21 and 21 and the movable base 22, but one of the guillotine shears is placed outside the fixed bases 21 and 21 and the movable base 22. It is arranged at another station on the trailing side of the moving base 22, and the tail end of the preceding welded material 1 is fixed to the fixed bases 21 and 21 and the moving base 22.
Before reaching during the period, the tail end is cut by the guillotine shear and a flammable fluid is applied, and then the tail end of the preceding welded material 1 is made to precede between the fixed bases 21 and 21 and the movable base 22. Further, before the tip of the trailing welded material 2 reaches between the fixed bases 21 and 21 and the movable base 22, the tip thereof is cut by the above-mentioned guillotine shear to apply a combustible fluid, and then the trailing welded material 2 The tip is placed between the fixed bases 21 and 21 and the movable base 22. Then, the materials to be welded 1 and 2 are brought into contact with each other and welding is performed in an oxygen-deficient atmosphere. By doing so, there is an advantage that the output side and the input side shears can be shared by one piece. Fixed side 21 and 21 and movable stand 22 by sharing exit side and entrance side guillotine shear
When the rotary shears are arranged on the trailing side of the movable table 22 on the outer side of the space, the rotary shears may be arranged in the same manner by sharing the outlet side and the inlet side shears.

[0029]

Since the present invention is constructed as described above, it has the following effects. According to the flash welding apparatus according to the present invention, in which flash welding is performed by cutting the ends of the leading and trailing welded materials with shears, respectively, before welding, the width direction starting end of the welded material is detected to detect the above. The application of the flammable fluid to the end face of the welded material is started, and the application of the flammable fluid to the end face of the welded material is stopped by detecting the widthwise end of the welded material. Therefore, the flammable fluid can be applied from the beginning to the end of the material to be welded in the width direction to be welded, and the excess or deficiency of the application can be reduced.

Further, the flammable fluid applying device has a nozzle that moves in the width direction of the material to be welded and applies the flammable fluid, and the sensor for detecting the width end of the material to be welded moves the nozzle in the width direction of the material to be welded. Since it is integrally attached to the nozzle at the preceding position in the direction of welding, the width-end detection sensor for the welded material detects the widthwise start and end of the welded material, and then the flammable flow rate is applied from the nozzle. Can be connected to. Further, since the nozzle and the welding material width end detection sensor are mounted on the shear, the Sharno carriage can be used as the nozzle and the welding material width end detection sensor carriage.

Further, a shear for cutting the end of the material to be welded, a sensor for detecting the width end of the material to be welded, and a nozzle for applying a flammable fluid,
Since it is used for both the preceding and following welded materials, the equipment becomes simple. Moreover, since grease is used as the flammable fluid, spontaneous dropping of the flammable fluid from the coating pipe can be minimized. Further, the welded material width end detection sensor for detecting the widthwise start end and the end of the welded material is provided respectively for the tail end of the preceding welded material and for the tip end of the following welded material, and the width for the tail end is provided. Edge detection sensor and the width end detection sensor for the tip, both by detecting the width direction starting end, to start the application of flammable fluid to the end surface of the material to be welded,
Either one of the width end detection sensor for the tail end and the width end detection sensor for the tip detects the widthwise end, so that the application of the flammable fluid to the end surface of the workpiece is stopped. Therefore, oil is applied from the widthwise starting ends where the leading and trailing welded materials 1 and 2 face each other, and
The application of the flammable fluid can be stopped up to the end in the width direction at which the two oppose each other.

Further, since a flammable fluid coating device has a control device and the flammable fluid coating device determines whether or not to coat the flammable fluid based on the steel type information input to this control device, it is not necessary to coat the flammable fluid. The application of the material to be welded can be stopped. Furthermore, since the control device is provided and the amount of the flammable fluid applied by the flammable fluid applying device is adjusted according to the steel type information input to the control device, a more accurate amount of the flammable fluid can be applied.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a flash welding device using a guillotine shear according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a configuration diagram illustrating a flammable fluid application system used in the first embodiment.

FIG. 4 is a diagram showing an example of a flammable fluid application table.

FIG. 5 is a flowchart illustrating a first stage of the operation of the flash welding apparatus according to the first embodiment.

FIG. 6 is a flowchart illustrating a latter stage of the operation of the flash welding apparatus according to the first embodiment.

FIG. 7 is an explanatory diagram of a flammable fluid application operation.

FIG. 8 is a configuration diagram of a rotary shearing device used in the second embodiment.

FIG. 9 is a flowchart illustrating a first stage of the operation of the flash welding apparatus according to the second embodiment.

FIG. 10 is a flowchart illustrating a latter stage of the operation of the flash welding apparatus according to the second embodiment.

FIG. 11 is a configuration diagram showing a conventional flash welding apparatus.

[Explanation of symbols]

1 Leading Welded Material 2 Trailing Welded Material 3 First Electrode 4 Second Electrode 5 First Clamp 6 Second Clamp 26 Outlet Guillotine Shear 27 Inlet Guillotine Shear 28 Carriage 31 Tail Edge Width Edge Detection Sensor 33 Tip Width edge detection sensor 35 Nozzle 36 Nozzle 43 Application amount adjuster 44 Variable speed motor 45 Pump 68 Outer shear 69 Inlet shear

Claims (8)

[Claims] 1. A welding material width end detection sensor for detecting a width direction starting end and an end of the welding material, wherein flash welding is performed by cutting the ends of the preceding and following welding materials with a shear. Before starting the application of a flammable fluid from the widthwise starting end of the material to be welded to the end face by detecting the widthwise starting end based on the widthwise end detection sensor of the material to be welded, the welded material is detected by detecting the widthwise end. A flash welding apparatus comprising a flammable fluid application device for stopping application of a flammable fluid to an end surface of a material. 2. The flammable fluid application device has a nozzle that moves in the width direction of the material to be welded and applies the flammable fluid, and the sensor for detecting the width end of the material to be welded has the nozzle in the width direction of the material to be welded. The flash welding device according to claim 1, wherein the flash welding device is integrally attached to the nozzle at a position preceding in the moving direction. 3. The flash welding apparatus according to claim 2, wherein the nozzle and the width end detection sensor for the material to be welded are mounted on the shear. 4. A shear for cutting an end of a material to be welded, a sensor for detecting a width end of the material to be welded, and a nozzle for applying a flammable fluid are commonly used for a preceding welding material and a following welding material. The flash welding device according to any one of claims 1 to 3. 5. The flash welding apparatus according to claim 1, wherein the combustible fluid is grease. 6. A welded material width end detection sensor for detecting a widthwise starting end and an end of the welded material is provided for each of the tail end of the preceding welded material and the tip of the following welded material, and the tail is provided. The width end detection sensor for the end and the width end detection sensor for the front end, both of which have detected the width direction start end, start the application of the flammable fluid to the end surface of the material to be welded, and the tail end width end. The application of the flammable fluid to the end surface of the material to be welded is stopped when one of the detection sensor and the width end detection sensor for the front end detects the widthwise end. The flash welding device according to any one of 2, 3, and 5. 7. A control device is provided, and whether or not the flammable fluid applying device applies the flammable fluid is determined based on the steel type information input to the control device.
The flash welding device according to claim 6. 8. A control device, wherein the amount of the flammable fluid applied by the flammable fluid applying device is adjusted according to the steel type information input to the control device. The flash welding device according to claim 1.